Name
printf
Synopsis
printf [filehandle] format, list
Description
Prints a
formatted string of the elements in list to
filehandle or, if omitted, the
currently selected output filehandle. This
is similar to the C library’s printf
and
fprintf
functions, except that the
*
field width specifier is not supported. The function is
exactly equivalent to:
print filehandle sprintf(format, list);
printf
and sprintf
use the same format syntax, but
sprintf
only returns a string; it doesn’t print to a
filehandle. The format string contains text with embedded field specifiers
into which the the elements of list are substituted in order, one
per field. Field specifiers follow the form:
%m.nx
A percent sign begins each field, and x
is the type of field.
The optional m
gives the minimum field width for appropriate
field types (negative m
left-justifies).
The .n
gives the precision for a specific
field type, such as the number of digits after a decimal point for floating-point
numbers,
the maximum length for a string, and the minimum length for an integer.
Field specifiers (x
) may be the following:
Code | Meaning |
---|---|
%
| Percent sign |
c
| Character |
d
| Decimal integer |
e
|
Exponential format floating-point number |
E
|
Exponential format floating-point number with uppercase E |
f
|
Fixed-point format floating-point number |
g
|
Floating-point number, in either exponential or fixed decimal notation |
G
|
Like |
ld
| Long decimal integer |
lo
| Long octal integer |
lu
| Long unsigned decimal integer |
Get Perl in a Nutshell now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.